I agree with Dmitri ^^ that diets generally have very little to do with facial aging
Well, he made one anecdotal claim about his father. This does not conclude that it is thus the case henceforth that diet+facial aging have no correlation. Personally I have seen too many cases of siblings, one older, one younger, looking years apart (the older one looking younger/healthier in some cases) due to dietary differences, to rule out the very definite possibility of diet strongly influencing appearance over the course of many years.
In mutant mice (defect in GH) you get less cross-linking and damage in the collagen (1), this is also seen in calorically restricted mice (2). Thus not only is there a dietary effect but most probably a genetic component that plays a large part.
We as humans though live outside where there is sun and environmental toxins so our "perceived" age probably has multiple factors to it. (3) is an older study looking at males (more recent studies focus on females nowadays [that is where the money is, which is counter to this forum's population]). Color and Shape play a large role, it was found that averaging many composites improved perception of age, the discussion mentions that the images were more blurry and this is what caused the younger perception, but it was probably due to the fact that any splotches and what not were ironed out. For some more recent reading on this (4-6). What one will see is that chronological age and skin age are not very tightly linked, perceived age is more accurate. Also facial structure plays a large role (e.g. bone structure, subcutaneous distribution, etc...). I originally got interested in this stuff when trying to find a way at home to test the skin (e.g. fluorescence for AGEs).
So while diet probably does play a role, I have seen people with very unhealthy lifestyles who have wonderful skin and look great for their age, and I'm sure there are folks out there practicing CR that look old for their age too. To look young, Sunscreen and Retin-A are probably best bet (of course this is on top of good diet, exercise, and proper supplementation).
btw, you look great for your age Skot and Matt.
Addendum: Also wrinkles play a large role in age perception. For many who get sunburned they notice that their skin is better (but this is just inflammation), and in my opinion some overweight/obese people have great skin for their age (subcutaneous fat stretching the skin?)
References
1. Proc Natl Acad Sci U S A. 2001 Jun 5;98(12):6736-41. Epub 2001 May 22.Lifespan extension and delayed immune and collagen aging in mutant mice with defects in growth hormone production.Flurkey K, Papaconstantinou J, Miller RA, Harrison DE.
2. J Gerontol. 1994 Mar;49(2):B71-9.Influence of age and long-term dietary restriction on enzymatically mediated crosslinks and nonenzymatic glycation of collagen in mice.Reiser KM.
3. Proc Biol Sci. 1995 Feb 22;259(1355):137-43.Perception of age in adult Caucasian male faces: computer graphic manipulation of shape and colour information.Burt DM, Perrett DI.
4. J Eur Acad Dermatol Venereol. 2008 Aug;22(8):982-91. Epub 2008 Jun 6.Influence of facial skin attributes on the perceived age of Caucasian women.Nkengne A, Bertin C, Stamatas GN, Giron A, Rossi A, Issachar N, Fertil B.
5. J Eur Acad Dermatol Venereol. 2010 Mar;24(3):341-8. Epub 2009 Sep 16.Ageing appearance in China: biophysical profile of facial skin and its relationship to perceived age.Mayes AE, Murray PG, Gunn DA, Tomlin CC, Catt SD, Wen YB, Zhou LP, Wang HQ, Catt M, Granger SP.
6. PLoS One. 2009 Dec 1;4(12):e8021.Why some women look young for their age.Gunn DA, Rexbye H, Griffiths CE, Murray PG, Fereday A, Catt SD, Tomlin CC, Strongitharm BH, Perrett DI, Catt M, Mayes AE, Messenger AG, Green MR, van der Ouderaa F, Vaupel JW, Christensen K.
Edited by Sillewater, 28 May 2011 - 11:03 PM.